The FBI has added a woman to its most-wanted terrorists list, making her the first female on the bureau's list of top terrorists.
Joanne Chesimard was convicted 40 years ago of murdering a police officer in New Jersey.
Chesimard was a prominent member of the Black Panther Party when the state trooper was slain on May 2, 1973.
She was also a member of the Black Liberation Army, described as one of the most violent US militant organisations of the 1970s, which claimed responsibility for the killing of several police officers throughout the US.
Chesimard, 65, was convicted of killing trooper Werner Foerster during a freeway traffic stop that turned violent.
She was sentenced to prison but escaped in 1979 with help from a coalition of radical, domestic terrorist groups.
Since then Chesimard has been a federal fugitive.
The FBI and the state of New Jersey are offering a $US2 million bounty for the capture of Chesimard, who now goes by the name Assata Shakur and is believed to be living in Cuba.
Chesimard's most wanted terrorist poster has been prepared in English and Spanish and can be viewed at www.fbi.gov
Photo: Joanne Chesimard in chained handcuffs and leg irons was taken from Riker's Island Prison to the Middlesex County Jail to await trial (Getty Images)